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RE: Image fading with Argyrotype
Hello Cor,
Out of the fog comes high school chemistry lesson nr .... The redox
reaction. Youre absolutely right! Ag ----> AG+ + 1e
and Ag+ + Cl- -----> deposids
Stupid I.R had not tought of that before.
By the way: How has youre, do it yourself, Goldcloride experiment worked
out?
Greetings,
Gerard de Vrueh
-----Oorspronkelijk bericht-----
Van: Cor Breukel [mailto:cor@lumc.nl]
Verzonden: vrijdag 24 maart 2000 13:07
Aan: alt-photo-process-l@skyway.usask.ca
Onderwerp: Re: Image fading with Argyrotype
Gerard,
I do not use the Argyotype chemistry, so I cannot help you on most of
your questions, but
> -would gold toning after the first wash, but before fixing, make any
> difference? (some articles i read put the gold toning before fixing, while
> others gold tone after fixing. is there a difference?).
>
...toning before fixing should protect the image better agains fading
(which I do not observe in my Kallitype printing), but toning after
fixing should be followed by yet a second fixing step, since one of the
byproducts of goldtoning is the formation of SilverChloride, and yoy do
not want that, and should be fixed out..
Cor